大埋深三软厚煤层一次采全高围岩控制技术

Surrounding rock control technology of large depth buried of three soft thick coal seam with one-time fully mining hight

为解决大埋深三软厚煤层复杂地质构造条件下,6.5 m一次采全高技术在综合机械化开采中的工程难点,利用矿压监测对采面和两巷超前段进行分析,并建立煤壁和围岩与支架相互作用数学模型,对平煤十一矿己16-17-24030工作面地质条件下煤壁片帮、顶板破碎、综采支架失稳和超前段巷道断面变形量大等关键技术进行分析。设计优化注浆孔、顶底板管理、支架前方顶板做大超前,控制移架推溜次序和伪斜控制等安全技术措施,并进行现场效果检验。该技术的应用,实现了日产原煤1.1万t、月产原煤20.5万t,取得了良好的社会经济效益,为中部矿区进行深部资源开采提供了参考。

In order to solve the engineering difficulties in the comprehensive mechanized mining of the 6.5 m full hight mining technology under the complicated geological structure conditions of large burial depth,three soft and thick coal seams,the mining face and the leading sections of the two roadways were analyzed and the mathematical model of the interaction between the surrounding rock and the support the coal wall was established,rib-spalling,broken roof,key technology of instability of support,large deformation of leading section of 己 16-17-24030 mining face in No.11 Mine of Pingdingshan Mining Group was analyzed.Technical safety measures like design optimization grouting hole,top and bottom plate management,large advance of support,the sliding order of the moving frame and the pseudo-oblique control,with test on-site,the applicatio of the technology developed 11000 t raw coal,2050000 t per month,with good social and economic benefit,which provided reference for deep mining for the middle of the mine.